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Chapter 3: Installation
13
Instrument
D4644-2
Instrument dimensions
126 mm (5.0 in)
21 mm
(0.8 in)
17 mm
(0.67 in)
55 mm
(2.2 in)
70 mm
(2.8 in)
30 mm (1.2 in)
minimum cable clearance
ST40
CAUTION:
The presence of moisture at the rear of the instrument could cause
damage either by entering the instrument through the breathing
hole or by coming into contact with the electrical connectors.
Each instrument must be positioned where:
• It is easily read by the helmsman or navigator
• It is protected against physical damage
• It is at least 230 mm (9 in) from a compass
• There is reasonable rear access for installation and servicing
• The rear of the instrument is protected from water.
3.2 Procedures
Adapt these procedures as appropriate, to suit your individual
requirement.
CAUTION:
Where it is necessary to cut holes (e.g. for cable routing and
instrument mounting), ensure that these will not cause a hazard by
weakening critical parts of the vessel’s structure. If in doubt, seek
advice from a reputable boat builder.
Fitting transducer
Instructions for installing and maintaining the speed transducer are
packed with it. Before attempting to install the transducer, read these
instructions and the Site requirements for transducers described in this
Chapter.
157_2c03.p65 01/05/01, 12:2213